Specifications
31
Alvium USB Cameras User Guide V3.1.3
Triggering
The following table shows how the shutter mode impacts available frame rates:
Sensor shutter types and triggering
Different shutter types are explained in
Triggering behavior differs between cameras with global shutter (GS) and
electronic rolling shutter (ERS). See
on page 120 for details.
Sensor type
Shutter mode
Trigger mode
Available frame rates
ROI frame rates
Global shutter
Global shutter
Freerun
Maximum values
Increased values
Global shutter
External trigger
Maximum values
Increased values
Rolling shutter
Rolling shutter
Freerun
Maximum values
Increased values
Rolling shutter
External trigger
Reduced values
Increased values
Global reset shutter
Freerun
Maximum values
No increase
Global reset shutter
External trigger
Maximum values
No increase
Table 8: Frame rates depending on shutter modes and trigger modes
Achieved frame rates may not match specified values
•
Some sensors have an exposure start jitter that may reduce maximum frame
rates.
•
Your individual setup may cause delays in data transmission.
Bandwidth adjustments
Consider the bandwidth available for camera payload depends on your individual
hardware, the operating system, software and drivers, and your application. We
recommend you to adjust
DeviceLinkThroughputLimit
and
MaxTransferSize
to your requirements. See
Operating systems and bandwidth
Interdependencies between ROI and ExposureTime values
Changing parameters for ROI can affect values for
ExposureTime
, such as
minimum, maximum, and increments, but
ExposureTime
itself as well. We
recommend you to set ROI values before you set values for
ExposureTime
.
See
Value changes by feature interdependencies
on page 130 for details.
DeviceLinkThroughputLimit
and
MaxTransferSize
can have an impact as well.
